The use of the #define, #if, and #endif preprocessor directives

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#define DEBUG

class Test
{
public static void Main()
{
int total = 0;
int counter = 0;

myLabel:
counter++;
total += counter;

System.Console.WriteLine(“counter = ” + counter);
if (counter < 5) { #if DEBUG System.Console.WriteLine("goto myLabel"); #endif goto myLabel; } System.Console.WriteLine("total = " + total); } } [/csharp]